Female Infanticide?

I would think human's ignoring the general foundations of Hamilton's Law needs no direct evolutionary explanation. It would seem more likely a by-product of our brains' evolution, specifically the ability to be cognizant of future socio-economic scenarios with great detail. Some the example's already stated (China, Victorian England, India...) show cultural and socio-economic selection defeating instinctive drives of kin selection.

Thinking about it I wondered if PPD had been worked into evolutionary theory and it has:
http://www.anth.ucsb.edu/projects/human/ppd.pdf
http://itb.biologie.hu-berlin.de/~hagen/papers/perinatal.pdf
The gist of which is that PPD is not a pathology but an expressed response, which leads to me ask if similar theories have been put forth for other apes. This might lead to the answer of your original question, Quetzal.

Thanks,
glad to be here.

LOL... I didn't realize this post started in 2003!Brennakimi,
if you would like to the find the article I'd certainly read it.Thanks